AU Diff gone, what now?

[Travisty FTT]

Hi All.

After a long weekend replacing the front end's wheel arm section thingo, we've realised that my AU's diff is also gone, and probably worse than the front end's problem.

Long story short, anyone know if the EF's diff will go straight in to an AU, as I have one down the back of the yard in the old car?

Cheers.

[RG]

If they're both live axle then the centres are a direct swap.

[Travisty FTT]

Originally Posted by RG

If they're both live axle then the centres are a direct swap.

My father's looking into it tomorrow, but how would I, not technically minded, know if they're both Live Axle?

[RG]

Originally Posted by Teknoslasher

My father's looking into it tomorrow, but how would I, not technically minded, know if they're both Live Axle?

What model AU?

[Travisty FTT]

Originally Posted by RG

What model AU?

Series 1 1998 AU Forte and the EF is a 1996 model.

[RG]

Then you do have live axle (non IRS) so it is a straight swap of the centres.

[frd906]

not live axel, as i own a 99 model

[au11futura]

should be live axle mate.

[Travisty FTT]

Don't mind my lacking terminology. So we swap the centers, but keep the arms that the axles run through and re-attach them?

[JC]

Originally Posted by frd906

not live axel, as i own a 99 model

Why do you continue to show your ignorance; posts like this (yours) throw confusion where there should be none. If it's not an XR, and not a Fairmont Ghia, then it has Live axle (ie solid diff), NOT IRS.

From now on, you should refrain from posting your opinion and presenting it as fact. Either don't post, or preface your post with something like "I don't know this for sure, but I think, or my mate has told me.........."

Teknoslasher - when swapping the centres over, you need to ensure that the gears mesh/lap properly and there's no play etc, so if you're unsure what you're doing, it might be time to take it to a diff specialist to get the work done.

[JC]

Originally Posted by Teknoslasher

Don't mind my lacking terminology. So we swap the centers, but keep the arms that the axles run through and re-attach them?

Kind of, but not really. The "arms" are attached to the centre part of the diff. This is what is referred to as a live axle because the whole diff moves when you hit a bump; with IRS, in theory, only the axle that cops the bump moves.

RG is talking about the internals when he refers to the "centres". You retain the AU axles but use the E series gears from the centre part of the diff.

Good luck with the swap over.

[Travisty FTT]

Originally Posted by JC

Kind of, but not really. The "arms" are attached to the centre part of the diff. This is what is referred to as a live axle because the whole diff moves when you hit a bump; with IRS, in theory, only the axle that cops the bump moves.

RG is talking about the internals when he refers to the "centres". You retain the AU axles but use the E series gears from the centre part of the diff.

Good luck with the swap over.

Thanks very much JC, clears it up. My old man knows what to do with pulling it all apart, but had asked me to find out if they'd be the same to avoid the cost of going to the wreckers to buy a second hand one and or removing the old one thinking the ef's would go straight in to it.

[JC]

Originally Posted by Teknoslasher

............My old man knows what to do with pulling it all apart, .............

I can't say the same, but I hope my boys might in 10 years or so!

And pulling apart is generally easy; it's the putting back together I sometimes struggle with.

[SLO AU XR8]

Originally Posted by Teknoslasher

Thanks very much JC, clears it up. My old man knows what to do with pulling it all apart, but had asked me to find out if they'd be the same to avoid the cost of going to the wreckers to buy a second hand one and or removing the old one thinking the ef's would go straight in to it.

An EF diff (the entire thing) will bolt straight in aswell, just making your AU have Pre-AU offset

[mik]

don`t forget to check if the ratio`s are the same on the ef diff as on the original(same amount of teeth on the larger gear(crownwheel) and the small one that meshes with it(pinion).

[martyauxr8ute]

did the au falcon S have irs as well ?

[RG]

Originally Posted by martyauxr8ute

did the au falcon S have irs as well ?

No, the only AU's to get IRS were the XR8, XR6 VCT, Fairmont Ghia & Fairlane...although I think I may be missing one from that list.

[brad`]

series 1 fairmont ghias were optional and you forgot T-series :P

[GK]

Originally Posted by JC

I can't say the same, but I hope my boys might in 10 years or so!

And pulling apart is generally easy; it's the putting back together I sometimes struggle with.

Yep, then we can sit back, maybe cook the barbie, whilst the boys work on both our vehicles! LOL!

Glad I'm not the only one with the putting back togeter bit!

GK

[RG]

Originally Posted by brad`

series 1 fairmont ghias were optional and you forgot T-series :P

I knew there was something amiss.

[au11futura]

Originally Posted by GK

Yep, then we can sit back, maybe cook the barbie, whilst the boys work on both our vehicles! LOL!

Glad I'm not the only one with the putting back togeter bit!

GK

lol yeh then they can come and do mine.

It sucks when you've done it so many times and it becomes not fun anymore, mabey i should stick to one car lol...........

[au11futura]

Originally Posted by JC

Why do you continue to show your ignorance; posts like this (yours) throw confusion where there should be none. If it's not an XR, and not a Fairmont Ghia, then it has Live axle (ie solid diff), NOT IRS.

From now on, you should refrain from posting your opinion and presenting it as fact. Either don't post, or preface your post with something like "I don't know this for sure, but I think, or my mate has told me.........."

Teknoslasher - when swapping the centres over, you need to ensure that the gears mesh/lap properly and there's no play etc, so if you're unsure what you're doing, it might be time to take it to a diff specialist to get the work done.

thats why i stuck out of this one to many people think they know because someone told them so.

some people need to read gregory's more often and become familiar with their cars.

[au11futura]

also mate when doing things such as diff make sure you buy new bearings and shims its always good to know you have replaced things like that just for piece of mind.

[Travisty FTT]

Well, at this point we have some good news. I've managed to pick up a diff from another forte, as well as the tail shaft. Best part is, its for free after some great business talking from my old man. They're apparently in really good nick, so fingers crossed all will be well.

[au11futura]

well done mate keep us posted.

[grime]

I would like to drop an LSD centre into bog standard au2 live axle futura sedan to help with towing etc.
On ebay I can get a reco 28spline lsd hemi and the seller informs me that all I will need to do is "use your crownwheel gear off your original hemi & bolt it on to the lsd hemi"
So,is it that easy?
Are there any pitfalls apart from changing the oil to LS90?
Cheers